Statements of Cash Flows - Summary of Supplemental Cash Flows Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Supplemental Cash Flow Information
Cash paid for interest	$ 64	$ 74
Cash paid for income taxes	472	278
Property and equipment acquired through capital lease	$ 323	$ 0